Closure fastener



June 19, 19347 G, M THOENNES 1,963,180

CLOSURE FASTENER Filed Aug. 22, 1952 GNWQM//m/ 7. /Z 725775777755.

f www y Patented June 19, 1934 CLOSURE FASTENER George lv. Thoelmes, Sturtevant, Wis. Application August 22, 1932, Serial No. 629,844

2 Claims.

This invention pertains to closure fasteners, and more particularly to a novel device for effectively holding the sliding sashes of a window against unauthorized opening from the outside thereof.

One of the primary objects of my invention is to provide a window fastener, which is automatically moved to its sash-locking position upon the closing of the sashes, so that the locking of the sashes is insured at all times without depending upon the memory of the housewife for the locking operation.

Another salient object of my invention is to provice a sash fastener embodying a pivoted cam carried by one sash and movable into binding engagement with the other sash, with novel means for automatically throwing the cam into its locking position when the sashes are slid to their closed position.

A further object of my invention is to provide a window fastener embodying a pivoted cam for movement into and out of locking engagement with the window sashes with a pivoted trigger associated with the cams and normally arranged in the path of the sashes, so that when the sashes are moved to their fully closed position, the trigger will function to automatically position the cam in its locking position.

A still further object of my invention is to provide an improved window fastener of the above character, which will be durable and efficient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more speciiically described, claimed and illustrated in the accompanying drawing, in which drawing:-

Figure 1 is a fragmentary vertical section through a window frame, showing the sashes in their closed position, and the locking cam in its binding engagement with the window sash.

Figure 2 is a similar View showing the sashes in an open position and the cam in its raised, inoperative, non-locking position.

Figure 3 is a top plan view of my improved fastener, showing the same applied to the top rail of a window sash.

Referring to the drawing in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates my improved fastener for a window W, the window W being of any preferred character or construction and embodying the usual frame 5 for receiving the sliding to-p and bottom sashes 6 and 7.

My improved fastener A comprises an attaching bracket l() having a base plate 11, which receives the fastening screws l2 for securing the saine to the top rail of the bottom sash 7. Formed on the base plate 11 are a pair of upstanding pivot ears 13 which receive therebetween the hub 14 of the locking cam 15.y A pivot pin 16 extends through the hub 14 of the cam and the pivot ears 13.

The construction of the cam 15 is such that when the same is swung into engagement withk the side rail of the top sash 6, a binding contact is brought about so as to prevent either the lowering of the top sash, or the raising of the lower sash.

In accordance with my invention, I provide a shoulder or a detent 17 on the hub 14 of the cam, which is adapted to be engaged by a similar shoulder or detent 18 formed on a trigger 19. This trigger 19 is pivotally connected to the base plate 11, and is provided with a depending tailpiece 20 which normally overhangs the inner top edge of the upper rail ofthe lower sash 7.

The trigger 19 can be pivotally connected to the base plate in any preferred manner, but for the sake of simplicity and ease of assembling, I provide a notch 21 in the lower face of the trigger adjacent to the rear end thereof. TheV base plate 11, between the pivot ears 13, is provided with an opening 22, and the walls of the notch 21 are adapted to fit over the base plate, as is clearly shown in Figure 2 of the drawing. The notch 21 denes a depending ear 23 which is rockably received within the opening 22.

In applying my fastener to a window, the base plate 11 is set inwardly of the inner edge of the top rail of the bottom sash, with the tail 20 overhanging the inner edge of said rail. Thus the trigger 19 rests on the upper face of the top rail when the sashes are in their open position. When the sashes are in their open position, the cam 15 is in its raised, non-locking position, as shown in Figure 2. Upon the closing of the sashes, the bottom rail of the upper sash will contact with the tail-piece 20 of the trigger, and thus swing the same on the base plate. The upward raising movement of the trigger will causo the downward swinging movement of the cam, due to the engagement of the shoulders 17 and 18. As the cam swings downwardly, the same will engage one side rail of the top sash, and upon downward movement of the top sash, or upward CSI movement of the bottom sash, the cam will bind against the top sash and prevent opening movement of the sashes.

When it is desired to release the window, the cam 15 is moved to its raised position by the hand of the operator, and will be held against swinging too far back by the engagement of the shoulders 1'7 and 18.

From the foregoing description, it can be seen that I have provided an exceptionally simple and durable window fastener, in which the locking member will be automatically moved to a locking position upon the closing of the sashes.

It is obvious that the locking cam is manually released by swinging the same upwardly upon its pivot 16 beyond the center of gravity. Hence, when the windows are brought to closed position the cam is automatically swung to its locked position by movement of the trigger 19 through engagement of the latter with the sash frame.

Changes in details may be made without departing from the spirit or scope vof this invention, but what I claim as new is:-

1. The combinationwith a window including an upper and a lower sliding sash, of a window fastener including a bracket secured to the top rail of the lower sash, a cam having a hub pivotally connected to the bracket and movable into and out of binding engagement with the side rail of the upper sash, a detent on the hub of the cam, a trigger pivotally connected with the bracket and provided with a detent normally engaging the detent on the hub for holding the cam in a raised position away from the upper sash against swinging movement, and a tail-piece on the triggeroverhanging the inner edge of the top rail of the lower sash and disposed in the path of the bottom rail of the top sash whereby upon closing of the sashes the trigger will be rocked to release the cam for swinging move- `ment into engagement with the upper sash.

2. vA window fastener comprising a supporting bracket including a base plate having a pair of pivot ears and an opening between said pivot ears, a cam including a hub pivotally connected to the ears normally movable to a lowered position, a trigger having a notch and an arm for engaging in said opening, the hub and trigger having interengaging teethfor holding the cam against swinging movement, and a depending actuating tail-piece on said trigger.

GEORGE M. THOENNES.

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